Bench structure with built-in dust collector

ABSTRACT

A LABORATORY BENCH ASSEMBLY INCLUDING A BENCH TABLE MOUNTED ON A PEDESTAL AND HAVING A DUST-COLLECTOR MECHANISM LOCATED IN THE PEDESTAL WITH THE DUCTS LEADING TO THE DUST COLLECTOR CONCEALED IN THE BENCH TABLE. A DUST-COLLECTING HOOD MAY BE LOCATED IN A DRAWER OF SAID BENCH TABLE AND PROVIDED WITH A TELESCOPING SLIP JOINT TO PERMIT THE DRAWER TO BE OPENED AND CLOSED.

Feb.'2, 1971 J. M. M CABE 3,559,383

vBENCH STRUCTURE WITH BUILT-IN DUST COLLECTOR Filed Harch s, 1969 I] 7Hum.

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b/z/w %%-%k 1 1%; [1/4 f/l/zrky United States Patent O 3,559,383 BENCHSTRUCTURE WITH BUILT-IN DUST COLLECTOR James M. McCabe, Chicago, Ill.,assignor to Coe Laboratories, Inc., Chicago, Ill., a corporation ofIllinois Filed Mar. 3, 1969, Ser. No. 803,563

' Int. Cl. B01d 46/02 US. Cl. 55-472 1 Claim ABSTRACT OF THE DISCLOSUREA laboratory bench assembly including a bench table mounted on apedestal and having a dust-collector mechanism located in the pedestalwith the ducts leading to the dust collector concealed in the benchtable. A dust-collecting hood may be located in a drawer of said benchtable and provided with a telescoping slip joint to permit the drawer tobe opened and closed.

SUMMARY OF THE INVENTION This invention is concerned with a laboratorybench assembly and more specifically with such an assembly having aconcealed, built-in dust collector.

An object of this invention is a laboratory bench assembly in which adust-collecting system is concealed in the pedestal thereof.

Another object is a laboratory bench assembly having a built-indust-collecting system in which the dust-collecting ducts are concealedin the bench table portion thereof.

Another object is a laboratory bench assembly having a dust-collectinghood mounted in a drawer of the bench table portion thereof with thedust hood arranged to move in and out of the table assembly with thedrawer.

Another object is a laboratory bench having a built-in dust collector inwhich the dust and particle-laden air passing through the dust collectoris required to make three 180 turns.

Another object is a laboratory bench assembly having a built-in dustcollector in which the blower is located beneath and to one side of thebag filter unit for ease of installation.

Other objects will be found in the following specification, claim anddrawings.

BRIEF DESCRIPTION OF THE DRAWINGS The invention is illustrated more orless diagrammatically in the following drawings wherein:

FIG. 1 is a perspective view of a laboratory bench assembly of thisinvention with some parts shown by broken lines;

FIG. 2 is a perspective view of the pedestal of the bench assembly ofFIG. 1 showing the components of the dust collector; and

FIG. 3 is a partial side elevational view of the drawer shown in FIG. 1.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to the drawings andParticularly to FIG. 1 thereof, the numeral 11..indicates the laboratorybench assembly of this invention. This bench assembly includes apedestal 13 on top of which is mounted a bench table 15. Bench tops 17are positioned on the bench table and are separated by a service shelfhousing 19. A service shelf 21 is mounted on the housing 19.

The pedestal .13 includes side walls 25 and 27 and end walls 29 and 31.The pedestal also has a bottom wall 33 and a top wall 35. (FIG. 2). Aremovable panel 37 is provided in the side wall 2.5 of the pedestal.Suitable gaskets may be provided for the panel but are omitted in thedrawings.

The bench table 115 has a side wall 41 with openings to receive drawers.One of the openings 43 receives an upper drawer 45 and a lower drawer47.An open-top grinding hood 49 is located in lower drawer 47. A duct 51leading to the hood telescopes inside a larger exhaust duct 53 locatedin the bench table. The exhaust duct 53 leads to an inlet opening 57 inthe top wall 35 of the pedestal.

A second inlet opening '59 in the top wall 35 of the pedestal 13 isconnected to a duct 61 which extends through the service shelf housing19 to an opening 63 in a side wall 65 of the service shelf housing. Anexhaust hood such as a fishmouth 67 connects to the opening 63 andextends over the bench top 17. It should be understood that suitableflexible hose may be substituted for V the ducts 53 and 61.

A vertical partition 71 is located in the pedestal inwardly of the inletopenings '57 and 59. This partition extends a short distance downwardlyfrom the top wall 35. A second vertical partition 73, parallel to andspaced from partition 71, extends from the bottom wall 33 of thepedestal and terminates below the top wall 35 thereof. A horizontalpartition 75 extends between the partitions 71 and 73. An opening 77 isformed in the horizontal partition. L-shaped brackets 79 are attached tothe underside of the partition 75 outwardly of the opening 77 to receivea filter frame '81 supporting bag filters 83. It should be noted thatthe L-shaped bracket attached to partition 71 may be formed as anintegral part of the partition in the manner shown in FIG. 2. A memberis located at the edge of partition 73 adjacent the side wall 25 foradditional support of the panel 37.

A blower 87 driven by an electric motor 89 is mounted in the pedestal 13between the partition 73 and the end wall 31. The blower is locatedbelow the opening 77 in the filter frame. The blower discharges to asilencer chamber 91 which may be lined with sound-absorbing insulation(not shown). Sound-absorbing insulation may also be installed on thewalls and partition surrounding the blower, but is not shown. Dischargeopenings 93 and 95 lead from the silencer box. These openings may beconnected by ducts or suitable flexible hose (not shown) to exhaust vent97 in the service shelf 21 or exhaust vent 99 in the end wall .101 ofthe service shelf housing 19. Alternately, the filtered air may exhaustbeneath the bench table.

An electric or manually operated vibrator may be attached to the filterbag unit to shake ofi accumulated dust. However, for clarity ofillustration, this has not been shown. As shown in FIG. 1, gas and airvalves and electric receptacles may extend through openings in the wall65 of the service shelf housing 19. The conduits and pipes for theseutilities may pass through the pedestal and bench table but are omittedfor clarity of illustration.

The use, operation and function of this invention are as follows:

Dust and particles from grinding operations may be drawn into the ducts53 and 61 through the exhaust hoods 49 and 67, respectively. The dustand particle laden air will follow the path indicated by the arrows inFIG. 2. The dust and particles will be intercepted and deposited on theoutside surfaces of the bag filters 83. The clean air will pass throughthe filters, flow over the partition 73, through the blower '87 and intothe silencer box 91. From the silencer box the air will be dischargedthrough the exhaust outlets 93 and 95. In flowing through the pedestal,the air will make three turns with the turns aiding in the removal ofdust and fine particles from the air.

The open top dust hood or grinding hood 49 can be used by opening thedrawer 47. When the drawer is closed, the duct 51 telescopes into theduct 53. The bag filters may be removed by removing the front panel 37and sliding the bag filters and their filter frame 81 out of theL-shaped brackets 79 through the opening in the side wall 25 of thepedestal. With the panel 37 removed, particles and dust may be cleanedout of the bottom of the pedestal.

Whereas the adaption of this invention to one form of laboratory benchassembly has been shown and described, it should be understood that thisshowing is illustrative only and the invention may be adapted to otherforms of laboratory bench assemblies.

What is claimed is:

1. A laboratory bench assembly including:

a pedestal housing,

a bench table including a side and top wall mounted on the top of saidpedestal housing,

a dust collector located in the pedestal housing,

at least one duct connected to the pedestal housing leading to said dustcollector with said duct extending through said bench table,

at least one drawer provided in said bench table extending through theside wall, and

a grinding hood located in said drawer including a conduit which isconnected to said duct by means of a telescoping slip joint and suctionmeans for causing air to flow through said grinding hood and dustcollector.

References Cited UNITED STATES PATENTS 10 2,347,334 4/1944 Schmieg 55-AC2,540,353 2/1951 Schick 10892 2,602,417 7/1952 Medcalf 98115 2,999,4489/ 1 96 1 Abler et al. 55AC 15 3,295,298 1/1967 Mackey 55AC 3,375,640 4/1968 Pelosi, Ir 55AC 3,475,884 11/1969 Kulzer 55341 US. Cl. X.R.

